Welcome to the Contra Costa County Assessor’s Office. The County Assessor is an elected official and is governed by the California Constitution, the laws passed by the Legislature, and the rules adopted by the State Board of Equalization.
NOTICE TO ALL VISITORS Our office lobbies are currently closed for public safety. The Assessor’s Office staff is still working and looking forward to serving you on the phone, online, and through the mail. For more countywide information related to COVID-19 (Novel Coronavirus) please visit the county’s webpage at www.contracosta.ca.gov.
NEW! FORM 571-L FILING DEADLINE EXTENDED: Click here for more information.